Do you want to closely observe or identify fish in the field? We have the answer! The patented T-P Tank allows teachers and researchers to immobilize fishes and other aquatic organisms in the field or lab. Animals can be viewed and studied, even photographed, before their release into natural waters. The tank is an ideal size to observe and photograph aquatic animals ranging from 1/2 to 6" in total body length and up to 1" body width. Sturdy construction of tempered glass with plastic-covered edges to prevent breakage. Holds about 1 qt of water. Approximate dimensions, 9" W × 12" H. With instructions.